Jīngjìxuéjiā / tōngguò / Ēngé'ěr / xìshù / fēnxī / jiātíng / de / shēnghuó / shuǐpíng经济学家通过恩格尔系数分析家庭的生活水平。Economists analyze a family's standard of living using the Engel coefficient.